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From: Pawel Jakub Dawidek <pjd@FreeBSD.org>
Date: Thu, 29 Apr 2010 15:42:24 +0000 (UTC)
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Subject: svn commit: r207372 - head/sbin/hastd
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Author: pjd
Date: Thu Apr 29 15:42:24 2010
New Revision: 207372
URL: http://svn.freebsd.org/changeset/base/207372

Log:
  - Check if the worker process was killed by signal and restart it.
  - Improve logging.
  
  Pointed out by:	Garrett Cooper <yanefbsd@gmail.com>
  MFC after:	3 days

Modified:
  head/sbin/hastd/hastd.c

Modified: head/sbin/hastd/hastd.c
==============================================================================
--- head/sbin/hastd/hastd.c	Thu Apr 29 15:36:32 2010	(r207371)
+++ head/sbin/hastd/hastd.c	Thu Apr 29 15:42:24 2010	(r207372)
@@ -108,6 +108,22 @@ g_gate_load(void)
 }
 
 static void
+child_exit_log(unsigned int pid, int status)
+{
+
+	if (WIFEXITED(status) && WEXITSTATUS(status) == 0) {
+		pjdlog_debug(1, "Worker process exited gracefully (pid=%u).",
+		    pid);
+	} else if (WIFSIGNALED(status)) {
+		pjdlog_error("Worker process killed (pid=%u, signal=%d).",
+		    pid, WTERMSIG(status));
+	} else {
+		pjdlog_error("Worker process exited ungracefully (pid=%u, exitcode=%d).",
+		    pid, WIFEXITED(status) ? WEXITSTATUS(status) : -1);
+	}
+}
+
+static void
 child_exit(void)
 {
 	struct hast_resource *res;
@@ -129,18 +145,17 @@ child_exit(void)
 		}
 		pjdlog_prefix_set("[%s] (%s) ", res->hr_name,
 		    role2str(res->hr_role));
-		if (WEXITSTATUS(status) == 0) {
-			pjdlog_debug(1,
-			    "Worker process exited gracefully (pid=%u).",
-			    (unsigned int)pid);
-		} else {
-			pjdlog_error("Worker process failed (pid=%u, status=%d).",
-			    (unsigned int)pid, WEXITSTATUS(status));
-		}
+		child_exit_log(pid, status);
 		proto_close(res->hr_ctrl);
 		res->hr_workerpid = 0;
 		if (res->hr_role == HAST_ROLE_PRIMARY) {
-			if (WEXITSTATUS(status) == EX_TEMPFAIL) {
+			/*
+			 * Restart child process if it was killed by signal
+			 * or exited because of temporary problem.
+			 */
+			if (WIFSIGNALED(status) ||
+			    (WIFEXITED(status) &&
+			     WEXITSTATUS(status) == EX_TEMPFAIL)) {
 				sleep(1);
 				pjdlog_info("Restarting worker process.");
 				hastd_primary(res);
@@ -300,19 +315,12 @@ listen_accept(void)
 			/* Wait for it to exit. */
 			else if ((pid = waitpid(res->hr_workerpid,
 			    &status, 0)) != res->hr_workerpid) {
+				/* We can only log the problem. */
 				pjdlog_errno(LOG_ERR,
 				    "Waiting for worker process (pid=%u) failed",
 				    (unsigned int)res->hr_workerpid);
-				/* See above. */
-			} else if (WEXITSTATUS(status) != 0) {
-				pjdlog_error("Worker process (pid=%u) exited ungracefully: status=%d.",
-				    (unsigned int)res->hr_workerpid,
-				    WEXITSTATUS(status));
-				/* See above. */
 			} else {
-				pjdlog_debug(1,
-				    "Worker process (pid=%u) exited gracefully.",
-				    (unsigned int)res->hr_workerpid);
+				child_exit_log(res->hr_workerpid, status);
 			}
 			res->hr_workerpid = 0;
 		} else if (res->hr_remotein != NULL) {